This primary source comes from the Records of the Patent and Trademark Office.
National Archives Identifier:
4531662Full Citation: Drawing of Improvements in Hoop Skirts; 4/2/1861; Records of the Patent and Trademark Office, Record Group 241. [Online Version, https://www.docsteach.org/documents/document/drawing-of-improvements-in-hoop-skirts, April 23, 2024]